<template>
  <el-form size="large" class="login-content-form">
    <el-form-item class="login-animation1">
      <el-input text placeholder="默认用户名：admin" v-model="state.ruleForm.userName" clearable
                autocomplete="off">
        <template #prefix>
          <el-icon class="el-input__icon">
            <ele-User/>
          </el-icon>
        </template>
      </el-input>
    </el-form-item>
    <el-form-item class="login-animation2">
      <el-input :type="state.isShowPassword ? 'text' : 'password'" placeholder="默认密码：123456"
                v-model="state.ruleForm.password" autocomplete="off">
        <template #prefix>
          <el-icon class="el-input__icon">
            <ele-Unlock/>
          </el-icon>
        </template>
        <template #suffix>
          <i
              class="iconfont el-input__icon login-content-password"
              :class="state.isShowPassword ? 'icon-yincangmima' : 'icon-xianshimima'"
              @click="state.isShowPassword = !state.isShowPassword"
          >
          </i>
        </template>
      </el-input>
    </el-form-item>
    <el-form-item class="login-animation3">
      <el-col :span="17">
        <el-input
            text maxlength="4" placeholder="请输入验证码"
            v-model="state.ruleForm.code"
            @keyup.enter="onSignIn"
            clearable
            autocomplete="off">
          <template #prefix>
            <el-icon class="el-input__icon">
              <ele-Position/>
            </el-icon>
          </template>
        </el-input>
      </el-col>
      <el-col :span="1"></el-col>
      <el-col :span="6">
        <el-button class="login-content-code" v-waves @click="handleDraw">
          <canvas ref="verify" :width="state.width" :height="state.height"  class="captcha-canvas"/>
        </el-button>
      </el-col>
    </el-form-item>
    <el-form-item class="login-animation4">
      <el-button type=""
                 class="login-content-submit" round v-waves
                 @click="onSignIn"
                 :loading="state.loading.signIn"
                 style="background-color: #1e1e1e; color: #fff">
        <span style="font-size: 1.2rem; font-weight: bolder">登 录</span>
      </el-button>
    </el-form-item>
  </el-form>
</template>

<script setup name="loginAccount">
import {computed, reactive, onMounted, ref, toRefs } from 'vue';
import {useRoute, useRouter} from 'vue-router';
import {ElMessage} from 'element-plus';
import {storeToRefs} from 'pinia';
import {useThemeConfig} from '/@/stores/themeConfig';
import {initBackEndControlRoutes} from '/@/router/backEnd';
import {Session} from '/@/utils/storage';
import {formatAxis} from '/@/utils/formatTime';
import {NextLoading} from '/@/utils/loading';
import {draw} from '/@/utils/draw_img_code';
import {useUserApi} from "/@/api/useSystemApi/user";
import {useUserInfo} from "/@/stores/userInfo";

// 定义变量内容
const storesThemeConfig = useThemeConfig();
const {themeConfig} = storeToRefs(storesThemeConfig);
const route = useRoute();
const router = useRouter();
const verify = ref(null);
const state = reactive({
  isShowPassword: false,
  width: 80,
  height: 40,
  imgCode: "", // 初始化图形验证码为空
  ruleForm: {
    userName: 'admin',
    password: '123456',
    code: '',
  },
  loading: {
    signIn: false,
  },
});

// 时间获取
const currentTime = computed(() => {
  return formatAxis(new Date());
});

onMounted(() => {
  if (verify.value) {
    // 初始化绘制图片验证码
    handleDraw()
  }
});

// 绘制验证码图片
const handleDraw = () => {
  const ctx = verify.value.getContext("2d");
  state.imgCode = draw(ctx, state.width, state.height);
};

// 登录
const onSignIn = async () => {
  state.loading.signIn = true;
  if (state.ruleForm.code.toLowerCase() === '') {
    ElMessage.error('验证码不能为空，请重新输入');
    handleDraw()  // 重新生成验证码
    state.loading.signIn = false;
    return
  }
  if (state.ruleForm.code.toLowerCase() !== state.imgCode.toLowerCase()) {
    ElMessage.error('验证码错误，请重新输入');
    state.ruleForm.code = ''; // 清空输入框
    handleDraw()  // 重新生成验证码
    state.loading.signIn = false;
    return
  }

  useUserApi().signIn({username: state.ruleForm.userName, password: state.ruleForm.password})
      .then(async res => {
        state.loading.signIn = false;
        // 存储token
        Session.set('token', res.data.token);

        // 存储用户信息
        await useUserInfo().setUserInfos();

        // 后端获取菜单数据
        await initBackEndControlRoutes();
        // 前端获取菜单数据
        // await initFrontEndControlRoutes();
        signInSuccess(false);
      })
      .catch((e) => {
        ElMessage.error('错误信息： ', e);
        state.loading.signIn = false;
      })
};
// 登录成功后的跳转
const signInSuccess = (isNoPower) => {
  if (isNoPower) {
    ElMessage.warning('抱歉，您没有登录权限');
    Session.clear();
  } else {
    // 初始化登录成功时间问候语
    let currentTimeInfo = currentTime.value;
    // 登录成功，跳到转首页
    // 如果是复制粘贴的路径，非首页/登录页，那么登录成功后重定向到对应的路径中
    if (route.query?.redirect) {
      router.push({
        path: route.query?.redirect,
        query: Object.keys(route.query?.params).length > 0 ? JSON.parse(route.query?.params) : '',
      });
    } else {
      router.push('/home');
    }
    // 登录成功提示
    const signInText = '欢迎回来！';
    ElMessage.success(`${currentTimeInfo}，${signInText}`);
    // 添加 loading，防止第一次进入界面时出现短暂空白
    NextLoading.start();
  }
  state.loading.signIn = false;
};

</script>

<style scoped lang="scss">
.login-content-form {
  margin-top: 20px;
  @for $i from 1 through 4 {
    .login-animation#{$i} {
      opacity: 0;
      animation-name: error-num;
      animation-duration: 0.5s;
      animation-fill-mode: forwards;
      animation-delay: calc(#{$i}/10) + s;
    }
  }

  .login-content-password {
    display: inline-block;
    width: 20px;
    cursor: pointer;

    &:hover {
      color: #909399;
    }
  }

  .login-content-code {
    width: 100%;
    padding: 0;
    font-weight: bold;
    letter-spacing: 5px;
    .captcha-canvas {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      border-radius: inherit; /* 继承按钮的圆角 */
    }
  }



  .login-content-submit {
    width: 100%;
    letter-spacing: 2px;
    font-weight: 300;
    margin-top: 15px;
  }
}
</style>
